Interesting concept, though it feels a little like "The 4400", "Crossing Jordan", and "Lost", with the air of mystery. Then again, it's a Bad Robot production. Not bad, so far, and I have seen the first two episodes. Definitely intriguing, though I can see how it might go sour after a while if they cannot keep it fresh and interesting (kind of like what happened to "Alias", another Bad Robot show).
But so far, it's good enough to keep me wanting to keep watching. Just enough mystery to hold most of my attention. Not strong enough to capture my full attention, though, so it might lose me if it doesn't give me more soon. I like Sarah Jones, so far, and having Jorge Garcia and Sam Neill gives it a strong cast. I hope this show survives and has some good story-telling to come with each new episode.